/* =============================================
   Frelia Design System - Light Theme
   ============================================= */

/* CSS Variables */
:root {
  /* Colors - Light Mode Base */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-bg-card: #ffffff;
  --color-bg-card-hover: #f8fafc;

  /* Accent Colors - Warm and Friendly */
  --color-accent-primary: #3b82f6;
  --color-accent-secondary: #2563eb;
  --color-accent-light: #dbeafe;
  --color-accent-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);

  /* Text Colors */
  --color-text-primary: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;

  /* Border Colors */
  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;

  /* Typography */
  --font-sans: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Container */
  --container-max: 1100px;
  --container-padding: var(--space-6);
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
}

img,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* =============================================
   Typography
   ============================================= */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--text-4xl);
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-xl);
}

h4 {
  font-size: var(--text-lg);
}

p {
  color: var(--color-text-secondary);
}

.text-accent {
  color: var(--color-accent-primary);
}

/* =============================================
   Layout
   ============================================= */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  margin-bottom: var(--space-3);
}

.section-header p {
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* =============================================
   Components - Header
   ============================================= */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-accent-primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent-primary);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: var(--transition-base);
}

@media (max-width: 768px) {
  #nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding-top: var(--space-12);
    gap: 0;
    background: var(--color-bg-primary);
    opacity: 1;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 9999;
  }

  #nav.active {
    transform: translateX(0);
  }

  #nav .nav-link {
    font-size: var(--text-lg);
    display: block;
    width: 100%;
    padding: var(--space-4) var(--space-6);
    text-align: center;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .header.menu-open {
    background: var(--color-bg-primary);
    backdrop-filter: none;
  }
}

/* =============================================
   Components - Buttons
   ============================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--color-accent-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* =============================================
   Components - Cards
   ============================================= */

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  font-size: var(--text-xl);
}

.card h3 {
  margin-bottom: var(--space-2);
}

.card p {
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* =============================================
   Hero Section
   ============================================= */

.hero {
  padding: calc(80px + var(--space-16)) 0 var(--space-16);
  background: var(--color-bg-secondary);
}

.hero-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: var(--space-4);
  font-size: clamp(var(--text-3xl), 6vw, var(--text-5xl));
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* =============================================
   About Section
   ============================================= */

.about-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: var(--text-lg);
  line-height: 2;
}

/* =============================================
   Services Section (Simplified)
   ============================================= */

.service-card {
  text-align: center;
}

.service-card .card-icon {
  margin: 0 auto var(--space-4);
}

/* =============================================
   Apps Section
   ============================================= */

.app-card {
  display: flex;
  flex-direction: column;
}

.app-card-image {
  aspect-ratio: 16/10;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  overflow: hidden;
}

.app-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-card h3 {
  margin-bottom: var(--space-2);
}

.app-card p {
  flex: 1;
  margin-bottom: var(--space-4);
  text-align: center;
}

.app-card-links {
  display: flex;
  gap: var(--space-4);
}

.app-card-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent-primary);
  transition: opacity var(--transition-fast);
}

.app-card-link:hover {
  opacity: 0.7;
}

/* =============================================
   CTA Section
   ============================================= */

.cta {
  text-align: center;
  background: var(--color-bg-secondary);
}

.cta h2 {
  margin-bottom: var(--space-3);
}

.cta p {
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* =============================================
   Footer
   ============================================= */

.footer {
  padding: var(--space-10) 0;
  background: var(--color-bg-tertiary);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent-primary);
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* =============================================
   Legal Pages
   ============================================= */

.legal-page {
  padding-top: calc(60px + var(--space-12));
  padding-bottom: var(--space-12);
  min-height: 100vh;
  background-color: var(--color-bg-secondary);
}

.legal-content {
  background-color: var(--color-bg-primary);
  padding: var(--space-8) var(--space-10);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-sm);
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h1 {
  text-align: center;
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-3xl);
}

.legal-content h2 {
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  font-size: var(--text-xl);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.legal-content p,
.legal-content li {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  line-height: 1.8;
}

.legal-content ul {
  padding-left: var(--space-4);
  margin-bottom: var(--space-6);
}

.legal-content ul li {
  position: relative;
  padding-left: var(--space-4);
  margin-bottom: var(--space-2);
}

.legal-content ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
}

.legal-table th,
.legal-table td {
  padding: var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.legal-table th {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  font-weight: 600;
  width: 30%;
  white-space: nowrap;
}

.legal-table td {
  color: var(--color-text-secondary);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
}

.info-table th,
.info-table td {
  padding: var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.info-table th {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  font-weight: 600;
  width: 30%;
  white-space: nowrap;
}

.info-table td {
  color: var(--color-text-secondary);
}

/* Mobile adjustments for legal pages */
@media (max-width: 768px) {
  .legal-content {
    padding: var(--space-6);
    border-radius: var(--radius-lg);
  }

  .legal-table th,
  .legal-table td {
    display: block;
    width: 100%;
  }

  .legal-table th {
    background: transparent;
    padding-bottom: var(--space-1);
    color: var(--color-text-primary);
    border-bottom: none;
  }

  .legal-table td {
    padding-top: 0;
    padding-left: var(--space-2);
    border-bottom: 1px solid var(--color-border);
  }

  .legal-table tr:last-child td {
    border-bottom: none;
  }

  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }

  .info-table th {
    background: transparent;
    padding-bottom: var(--space-1);
    color: var(--color-text-primary);
    border-bottom: none;
  }

  .info-table td {
    padding-top: 0;
    padding-left: var(--space-2);
    border-bottom: 1px solid var(--color-border);
  }

  .info-table tr:last-child td {
    border-bottom: none;
  }
}

/* =============================================
   Animations
   ============================================= */

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 {
  transition-delay: 0.1s;
}

.stagger-2 {
  transition-delay: 0.2s;
}

.stagger-3 {
  transition-delay: 0.3s;
}

/* =============================================
   Responsive
   ============================================= */

@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-4);
  }

  h1 {
    font-size: var(--text-3xl);
  }

  h2 {
    font-size: var(--text-2xl);
  }

  .section {
    padding: var(--space-12) 0;
  }

  .hero {
    padding: calc(60px + var(--space-10)) 0 var(--space-10);
  }

  .hero-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    padding-left: var(--space-2);
    padding-right: var(--space-2);
    font-size: var(--text-sm);
  }
}

/* =============================================
   Modal
   ============================================= */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  padding: var(--space-4);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg-primary);
  border-radius: var(--radius-2xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-xl);
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.modal-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  flex-shrink: 0;
}

.modal-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-title-wrap {
  flex: 1;
}

.modal-title-wrap h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-1);
}

.modal-title-wrap p {
  font-size: var(--text-sm);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: background var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.modal-body {
  padding: var(--space-6);
}

.modal-section {
  margin-bottom: var(--space-6);
}

.modal-section:last-child {
  margin-bottom: 0;
}

.modal-section h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

.modal-section p {
  font-size: var(--text-sm);
  line-height: 1.7;
}

.modal-section ul {
  padding-left: var(--space-4);
}

.modal-section li {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  position: relative;
  padding-left: var(--space-3);
}

.modal-section li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
}

.plan-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.plan-table th,
.plan-table td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.plan-table th {
  background: var(--color-bg-secondary);
  font-weight: 600;
  color: var(--color-text-primary);
}

.plan-table td {
  color: var(--color-text-secondary);
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-3);
  justify-content: center;
}

.btn-detail {
  font-size: var(--text-sm);
  color: var(--color-accent-primary);
  font-weight: 500;
  padding: var(--space-2) 0;
  margin-top: var(--space-2);
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.btn-detail:hover {
  opacity: 0.7;
}

/* =============================================
   Carousel
   ============================================= */

.carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-bg-tertiary);
}

.carousel-inner {
  display: flex;
  transition: transform var(--transition-base);
}

.carousel-slide {
  min-width: 100%;
  aspect-ratio: 9/16;
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.carousel-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--color-bg-tertiary);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-full);
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
  z-index: 10;
}

.carousel-btn:hover {
  background: white;
  box-shadow: var(--shadow-lg);
}

.carousel-prev {
  left: var(--space-2);
}

.carousel-next {
  right: var(--space-2);
}

.carousel-dots {
  position: absolute;
  bottom: var(--space-3);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-2);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.2);
  transition: background var(--transition-fast);
}

.carousel-dot.active {
  background: var(--color-accent-primary);
}

/* =============================================
   Service List
   ============================================= */

.service-list {
  text-align: left;
  margin-top: var(--space-4);
  padding-left: 0;
}

.service-list li {
  position: relative;
  padding-left: 1.5em;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.service-list li::before {
  content: '✔';
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
  font-weight: bold;
}

.service-card p {
  text-align: center;
}